Allow nodes to be removed

lib/tapioca/rbi_ext/model.rb

@@ -112,6 +112,12 @@ def create_method(name, parameters: [], return_type: nil, class_method: false, v
       self << method
     end
 
+    sig { params(name: String).void }
+    def remove_method(name)
+      method = nodes.grep(RBI::Method).find { |node| node.name == name }
+      nodes.delete(method) if method
+    end
+
     private
 
     sig { returns(T::Hash[String, RBI::Node]) }

spec/tapioca/rbi_builder_spec.rb

@@ -17,6 +17,9 @@ class BuilderSpec < Minitest::HooksSpec
         rbi.create_type_variable("G", type: "type_member")
         rbi.create_type_variable("H", type: "type_template", variance: :in, fixed: "Foo")
         rbi.create_method("foo")
+        rbi.create_method("bar", return_type: "String")
+        rbi.remove_method("bar")
+        rbi.create_method("bar", return_type: "Integer")
 
         assert_equal(<<~RBI, rbi.string)
           class A; end
@@ -30,6 +33,9 @@ module B; end
 
           sig { returns(T.untyped) }
           def foo; end
+
+          sig { returns(Integer) }
+          def bar; end
         RBI
       end
 
@@ -120,6 +126,12 @@ module Bar; end
           end
         RBI
       end
+
+      it "does not raise an nonexistent method is removed" do
+        rbi = RBI::Tree.new
+        rbi.remove_method("garbage")
+        assert_equal("", rbi.string)
+      end
     end
   end
 end